Double-walled vessel.



G. P. ALTENBERG. DOUBLE WALLE D VESSEL. APPLIOATION FILED DEC. 23, 1907.

Patented Oct. 6, 1908.

GEORGE P. ALTENBERG, .OF CINCINNATI, OHIO.

Specification 01'. Letters Patent.

DOUBLE-WALLED VESSEL.

Patented Oct. 6, 1908.

Application filed December 23, 1907. Serial No. 407,762.

To all whom it may concern:

Be it known that I, GEORGE. P. ALTEN- BERG, a citizen of the UnitedStates, residing at- Cincinnati, in the county of Hamilton and State ofOhio, have invented certain new and useful Improvements in Double-Walled Vessels, of which the following is a specification.

My invention relates to double walled vessels adapted to preserve thecontents at substantially the temperature 'at which they have beenplaced in the vessel, for a considerable period of time, and theinvention will be readily understood from the following description andclaims,and from the drawing, in which latter:

Figure l is a front elevation of my im proved device, partly brokenaway. Fig. 2 is a central vertical longitudinal section of the same,taken on a line corresponding to the line zz of Fig. 3. Fig. 3 is ahorizontal cross-section of the same taken on the line ;1 3 of Fig. 1.Fig. 4 is a bottom perspective view of the vessel, partly broken away,with the outer casing removed. Fig. 5 is a perspective view of thebasket holding the supporting pieces in place. Fig. 6 is a detailshowing the connection between one of the supporting pieces and-the.wire of the basket, in section on a line corresponding to the line 00of Fig. 7; and Fig. 7 is a similar detail on a line corresponding to theline w-w of Fig. 6.

1 represents an inner member of the vessel constricted at its top forforming a neck 2, and 3 is an outer member of saidvessel alsoconstricted at its top for forming a neck 4,

these necks being joined preferably approximately at'their ends as shownat 5 for forming the combined neck 6 of the vessel... The joining"preferably takes place by fusing the necks 214. or otherwisehermetically sealing the same. The vessel is preferably formed of glassor other substance which is impervious to air. A space 7 is formedbetween the members of the vessel,.this space surroundingthe innermember. The a1r ,in this spaceis withdrawn or practically exhausted forforming a vacuum which in practice acts as a heat-insulating blanket.for the inner mem-.

ber. For accomplishing the withdrawal of the air, I provide the outermember with a nipple 8 through which the air inthe cavity is withdrawn,the nipple being sealed, as by fusing, after withdrawal of the air andthe outer vessel.

' thereby sealing the vacuum which has been created in the cavity.

10 is a basket upon which supporting pieces 11 are held. The framing ofthe basket is preferably composed of wires, which I prefer to cover witha heat-insulating material 13, such as asbestos, shown in the form ofcord wound about the wires. These sup porting pieces are also ofheat-insulating material, and I have found that asbestos forms apreferable material out of which these pieces are made. Aheat-insulating separating or supporting medium is thus formed betweenthe inner and outer members which permits expansion and contractionvespecially of the inner member without undue strain upon different partsof the same. The structure comprising the basket and supporting piecesthereon is supported from My improved structure prevents unequalresistance upon different parts of the inner member, and acts as asupport for the inner member without itself in turn depending for itssupport upon said inner member. In this mannerfracture of the innermember at the neck or at other parts isavoided. the inner member beingsupported laterally and longitudinally for permitting its expansion andcontraction relatively to the outer member, there being suflicientresiliency in the supporting pieces to permit this. I prefer that thebasket shall comprise lateral wires 14 and longitudinal wires 15,16,which latter are bowed,about the lower end of the inner member. At thejunction between the lateral and longitudinal wires, one of them istwisted about the other as shown at 17 and at this junction the wiresare'bared of their insulating covering as shown at 18 for reducing thesize of the joint, thepieces being secured to the wires at the joints.

twisted. 4

The vessel is adapted to be closed by a suitable stopper 19. Aprotectingca-smg 20 The wires may cross at the bottom of the innermember without belng surrounds the vessel and is held with relationthereto at its top by a collar 21, which may be of plaster of paris forholdin the neck of the vessel and the neck22 of the. casing in rigidrelation. A packing 23 surrounds the vessel inside the casing and extends longitudinally of the same. I prefer,

this packing to be of corrugated strawboard. The bottom of the vessel ispreferably supported ,on a felt pad 24. A releasable cup 25 takes aboutthe neck 22 and is releasably secured thereto in suitable manner as byhaving screw-connection 26 therewith.

Having thus fully described my invention what I claim as new and desireto secure by Letters Patent is: 7

1. In combination, a doiible'walled vessel comprising an inner memberand an outer member havinga heatinsulating space therebetween, a basketcomposed of wire located in said space and surrounding the lower part ofsaid inner member, supporting pieces located between the side walls ofsaid inner and outer members anda supporting piecebetween the bottomwalls of said members, said supporting pieces being held in place bysaid basket.

2. In combination, a double walled vessel comprising an inner member andan outer member having a heat insulating space therebetween, a basketcomposed of heat 1nsulated wire located in said space and surroundingthe lower part of said inner member, supportingpieces located betweenthe side walls of said inner and outer members and a supporting piecebetween the bottom walls of said members, said supporting pieces beingheld in place by said basket.

In testimony whereof, I have subscribed my name hereto in thepresence'of two Subscribing witnesses,

GEORGE P. ALTENBERG. Witnesses:

EARLER. PASSEL,

FLORENCE QUiNN.

